A new Moshiri sample before the Kyushu earthquake
The official ISEE/ERGSC archive exposed additional Moshiri CDF files through 27 July 2026. The newest validated sample, at 23:00 UTC on 27 July, is roughly eight hours before the Kyushu earthquake on 28 July.
Its robust anomaly score was elevated, but earlier samples on 15 and 16 July were at least as strong. There is no direct Moshiri file for the mainshock or immediate aftermath yet, so this is a candidate anomaly rather than evidence of a VLF precursor.
The analysis is deliberately conservative: it compares spectral-feature medians against a baseline median, scales by the baseline median absolute deviation, and averages robust absolute deviations across selected channels. Japan data and derived features are used only for scientific research.
See the full analysis and next actions.